A motorcyclist was killed in a wreck early Saturday in Oxnard, authorities said.

A caller reported the crash around 1:16 a.m. on Gonzales Road, just west of Campus Road, saying the motorcyclist was down in the roadway. The site is across the street from Oxnard High School, east of Victoria Avenue.

Oxnard Police Department officers found the male rider lying dead in the road when they arrived, authorities reported. He had been riding a black 2017 Yamaha YZF-R6, authorities said, a high-performance model. No other vehicles were involved.

The department’s initial investigation found the cyclist had been traveling west on Gonzales at high speed when, for unknown reasons, the motorcycle left the road and struck a tree. They do not yet know whether alcohol or drugs were a factor.

Oxnard police officers look down Gonzales Road on Saturday morning at the scene of a fatal motorcycle crash in front of Oxnard High School. At left, the trunk of a tree damaged during the crash is visible. GRETCHEN WENNER/THE STAR

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The fatal crash closed Gonzales Road between Victoria Avenue and Patterson Road in both directions for hours as officials investigated and crews cleaned up debris. Authorities were on the scene well after daybreak. For a time, yellow police tape blocked off the sidewalk at Merion Way as officials worked near Campus Road. At least two tree trunks with portions of their bark stripped away were visible. Gonzales Road had fully reopened shortly before 9:30 a.m.

The incident is still under investigation. Anyone who saw the crash or has information about it is asked to call Officer Manuel Perez III at 805-385-7750.